Plain bearing



Sept 9 7 N. A. PALMGREN zfiwyzm PLAIN BEARING Filed Dec. '7, 1934 I IINVENTOR 7 5 BY Nils Arvid Palmgrgn ATTORNEY Patented Sept. 1, 1936PATENT OFFICE 2,053,201 PLAIN BEARING Nils Arvid Palmgren, Goteborg,Sweden,

signor to Aktiebolaset Svenska ullagerfabriken, Goteborg, Sweden, acorporation of Sweden Application December 1, 1934, Serial No. 156,542

r In Sweden March 15. 1934 4 Claims.

The most effective lubrication of a plain bearing is obtained bysupplying oil to the sliding surface through channels in the rotatingpart, whereby the oil is conducted to the said part at a point 5 nearertothe axis of the shaft than the sliding surface. This is mostconveniently done by introducing the oil through a hole in the center ofthe shaft, whence it can subsequently pass outwards through suitablechannels. In most cases,

however, this method is not practicable as the end of the shaft isinaccessible for connection to a conduit.

In plain bearings for mounting on a solid shaft and comprising an innerand outer bearing ring the oil must be introduced to a part of the innerring which lies nearer to the axis of the shaft than the slidingsurface. One manner of accomplishing this result which might besuggested is by providing the inner ring with a flange which is allowedto dip'into an oil bath so that oil is transferred to the inner surfaceof the flange, whence it can subsequently be thrown out throughchannelsonto the sliding surface. In practice it has however, been foundthat that part of the oil adjacent to the flange is caused to rotate sorapidly that the flow of oil to the flange is insufficient to bring morethan the edge of the flange into contact with the oil. During therotation of the bearing the'oil cannot penetrate to the inner surface ofthe flange at the usual bearing speeds, and consequently no oil canreach the sliding surface through the channels.

v The present invention has for its purpose to obviate this fundamentaltrouble. It can be applied to bearings with oil bath lubricationcomprising a rotating and a or bearing ring with mating sliding surfacesand is characterized substantially by an axially extending flangeconnected to the rotating ring and having its inner surface facing theshaft on a smaller radius than the sliding surface, a lubricatingchannel from the aforementioned inner surface to the sliding surface andan annular member connected'to the non-rotating ring embracing the edgeof the flange for preventing the same from transmitting a rotarymovement to the oil bath.

' Through this arrangement the oil from the oil bath is seized by theinner surface of the flange and not by its edge and is then thrown outthrough the channels to the sliding-surface.

, The invention is illustrated in the accompany? ing drawing.

Figure-1 is a section in au -axial plane through 66 a radial bearingaccording tooneembodiment of non-rotating member the invention. Figure 2is a. side view of the same bearing, and Figure 3 is a section in anaxial plane of a thrust bearing according to another embodiment of theinvention.

The inner ring I in Figure 1, is, in practice, mounted on a shaft. Itbears with a cylindrical 'sliding surface against the outer ring 3 whichis seated in the bearing housing 2. The inner ring i has an I-sectionand its two outer flanges l form the sliding surface of the inner ring.The 10 inner surfaces 5 of the inner ring are tapered, having theirsmallest diameter at the edges 6 of the flanges. Annular plates 1 areprovided at the outer ring 3 and are formed in such a manner that theyembrace the flanges and prevent the edges of 15 the same fromtransmitting their rotation to the oil bath. The annular plates 1 inthis case embrace the edges of'the flanges and part of their innersurface.

The oil is introduced from the oil bath 8 20 through the apertures 9,whereby it flows directly onto the inner surface 5 of the flanges.Through the tapered form of the flanges the oil is forced by centrifugalforce toward the central plane of the bearing to the channel in whichconnects the inner surfaces 5 with the sliding surface. As soon as theoil comes into contact with the inner ring I, it will be carried alongin the rotation, but outside the plates 1 the oil bath remainsstationary. This is essential in order to 3 avoid the formation of foamin the oil bath and to prevent the oil from being thrown about in thebearing housing and leaking out through the seals.

The oil that has passed the sliding surface is 35 then free to return tothe oil bath through the comparatively narrow apertures H.

Intheform of the invention illustrated in Figure 3 a bearing ring l3 andan axially downwardly extending flange H are mounted on the shaft 40 [2.The inner surface of the flange is tapered to such a degree that the oilis propelled upwards along the same during the rotation of the shaft.

The bearing ring l3 bears with a plane sliding surface against thenon-rotating ring l5 which 45 is in its turn seated in the bearinghousing IS. The flange N is'embraced by an annular part If formed in thehousing. The oil which stands at thelevel it outside the bearing iscaughtby the inner surface 20 of the flange M at the edge IQ of theannular part I 1 and is caused to rotate and to follow the surface 20upwards until it is brought to the sliding surface through the channel 2I.

The invention can, however, be carried out in other ways. The annularpart can thus cover the very edge of the flange against which it,shouldbear without any considerable play.

Having thus described my invention, I claim and desire to secure byLetters Patent:

1. In a plain bearing, in combination; a rotating and non-rotating ringwith mating sliding surfaces an axially extending flange, connected tothe rotating ring and having its inner surface facing the shaft onsmaller radius than the sliding surface; the rotating ring beingprovided with a lubrication channel from the said inner surface to thesliding surface, a housing surrounding the said non-rotating ring, andan annular member, connected to said non-rotating ring and formingtogether with the housing a lubricant container, the said annular memberbeing interposed between the body of the lubricant and the edge of theflange and embracing the edge and part of the inner surface of theflange and having an opening within the flange for admitting lubricantfrom the lubricant container to the lubricant channel.

2. Improvement according to claim 1,v characterized thereby that theinner surface of the aosaaor flange is tapered with the edge.

3. Improvement according to claim 1, characterized thereby that theannular member embraces the edge of the flange and part of the innersurface of the flange.

I 4. In a plain bearing, in combination: a chamber of lubricant, astationary outer bearing ring located within such chamber and having aninternal sliding surface, a. rotatable inner bearing ring having anexternal sliding surface mating with the sliding surface of the outerring, the inner ring having an annular axially extending flange at itsouter beriphery, there being lubricant channels extending from the innersurface of the flange to the sliding surface of the bearing, annularplates in engagement with the outer bearing ring. Portions of the saidplates being offset axially inwardly within the flange oi the inner ringand lubricant openings in the oii'set the smallest diameter at portionsof the annular plates for admitting lubricant to the internal innerbearing ring.

NIL-S ARVID PALMGREN.

surface of the flange of the

